Question

Q1. Is oxygen a element or a compound?
Q2. Is carbon dioxide a element or a compound?
Q3. Is nitrogen a element or a compound? ​

Answer 1

Answer:

Oxygen is an element which exists as an atom or a molecule. 

2. Carbon dioxide (CO2) is one atom of carbon (which is an element) and two atoms of oxygen (which is also an element. Therefore, carbon dioxide is a compound.

3.

Explanation:

Nitrogen is an element, not a compound. It is found in nature as nitrogen gas, also called dinitrogen, with the chemical formula N2 , and makes up 78% of the atmosphere.

Answer 2

Answer:

1st one is element.

2nd 9ne is compound becoz it is made up of two pure gases.

3rd one is element.